A non-transitory storage medium storing a display program that causes a display device to execute: an image display processing; a storage processing for storing arrangement information for arranging image data along a first and a second direction; a determination processing for determining whether a scroll direction of a currently displayed image is in a first or a second direction; a first image-setting processing for setting, as a target image, an image arranged in the first direction with respect to the currently displayed image, based on the arrangement information, when the direction is the first direction; and a second image-setting processing, for setting, as the target image, an image arranged in the second direction with respect to the currently displayed image, based on the arrangement information, when the direction is the second direction, wherein the target image is displayed when it is set in the first or second image-setting processing.